Korg M1 Keybed service - (sticky keys)

Korg's M1 was the benchmark by which all other workstations were measured. Still very usable today it has become something of a "classic" and definitely deserves a spot here on Yamaha Forums UK.

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Korg M1 Keybed service - (sticky keys)

Unread post by parametric » Sun Jul 31, 2016 4:12 pm

I've posted this here as it is about the M1, but is probably relevent to most Synths . . . . .

Yumi Hara is a Japanese Lady who was a Post Graduate at the Uni where I worked, and is now a working Musician . . .

She contacted me a while back concerning her M1 and I directed her here for info/help . .

It obviously worked (Y)

She posted these on FB and I reproduce them here so others can benefit . . . . (Thanks Yumi!)
1 Sticky keys - deteriorated grease.jpg
1 Sticky keys - deteriorated grease
2 New Grease from Korg UK.jpg
2 New Grease from Korg UK
3 Grease 10ml in a syringe.jpg
3 Grease 10ml in a syringe
4 Board removal to access keybed.jpg
4 Board removal to access keybed
5 FS Keys (Yamaha) 3 points to grease . ..jpg
5 FS Keys (Yamaha) 3 points to grease . .
6 Applying grease.jpg
6 Applying grease
7 Remove hardened grease.jpg
7 Remove hardened grease
8 Best to replace black keys first (easier).jpg
8 Best to replace black keys first (easier)
Job Done ((i))

Yumi later said . . . .
Mission accomplished in one day!! that generation of synths are very well-built with good quality materials, so if we look after them nicely, they last long, and keys have nice feel. I opened the back lid of a synth for the first time when I replaced the internal battery, but it is more or less the same feel as opening desktop PC case, and cleaning the keys were somewhat similar to cleaning hair brush, I thought...so it was really OK! KORG M1
Photos © Yumi Hara

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Re: Korg M1 Keybed service - (sticky keys)

Unread post by Derek » Sun Jul 31, 2016 7:03 pm

Looks like the same keybed inside Yamahas of the same era. It's not a complex job, but requires some confidence in ripping everything out to get the keybed. The trick of course is to take lots of pictures whilst taking things apart to guide you when putting things back together again.....
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Re: Korg M1 Keybed service - (sticky keys)

Unread post by Miks » Sun Jul 31, 2016 10:23 pm

Derek wrote:Looks like the same keybed inside Yamahas of the same era.
It IS the same keybed - I know because I serviced my M1 some time ago and while resoldering ALL key kontacts (some soldering joints went loose over the years) I found the name of YAMAHA etched to the copper side of the keybed's pcb... 0-)
My (key related) gear (in alphabetical order):
Kawai: K1 II
Korg: M1 (up'd to EX, w/ 'Cool Blue'), M1REX (w/ 'Cool Blue'), Poly-800
Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500, TX-802, YMM2
Sector101: SYEMB05 (5x), SYEMB06 (3x), EXFLM2 (1kit), MCD Sweet16 (1x), WaveBlade 8MB Card (1x) & 1x Programmer Unit for WaveBlade

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